Well, of course both are the same although artists have made attempts to paint pictures of them with limited success because the colors of opal are not static. They are constantly moving so an artist has great difficulty in creating a picture of these wonders of creation.
As you can see, the pictures of opal you see below are many and varied. Most of the colors of the rainbow are represented from green to blue to yellow to orange to crimson and purple and all the variations in between. Actually these amazing stones have well been described by a historical character who lived back in the first century, by the name of Pliny the elder. Here are his observations:
Pictures of opal in the mind of a famous historian
“Opal is made up of the glories of the most precious gems; to describe them is a matter of inexpressible difficulty. For there is amongst them the gentler fire of the ruby, there is the rich purple of the amethyst, there is the sea-green of the emerald, and all shining together in an indescribable union. Others, by an excessive heightening of their hues equal all the colors of the painter, others the flame of burning brimstone, or of a fire quickened by oil.” – Pliny the elder
In modern times millions of pictures of opal have been taken and even though some may look similar at first glance, if you take a close look you will find that each one is individual. No two are exactly the same. Of course technically this goes for all gemstones but with diamonds (for example) the difference can only be seen by someone who knows the stone technically, unless of course the stone is really bad quality and then it might be more obvious. However in the case of opal the differences are patently obvious.
Pictures of opal to identify what you have
This means that when you own an opal, you are in possession of something that can match your personality and can be just about as unique as you. Your preference might be for the full colored stones which are technically much more expensive if they are high quality, or you might like something that looks a bit more natural with some indications of the mother rock as a part of the presentation.
Some of the boulder opals shown elsewhere at the www.opalmine.com site not only have fascinating colors in the opal itself but are combined with ironstone and sandstone inclusions which make for even more diversification in looks and more uniqueness. Whatever your preference, the pictures of opal shown here will give you some ideas as to what is available.